Dirac cone intensity asymmetry and surface magnetic field in V-doped and pristine topological insulators generated by synchrotron and laser radiation

A. M. Shikin, A. A. Rybkina, D. A. Estyunin, D. M. Sostina, I. I. Klimovskikh, V. Yu Voroshnin, A. G. Rybkin, K. A. Kokh, O. E. Tereshchenko, L. Petaccia, G. Di Santo, A. Kimura, P. N. Skirdkov, A. K. Zvezdin, A. K. Zvezdin

Research output

3 Citations (Scopus)

Abstract

Effect of magnetization generated by synchrotron or laser radiation in magnetically-doped and pristine topological insulators (TIs) is presented and analyzed using angle-resolved photoemission spectroscopy. It was found that non-equal photoexcitation of the Dirac cone (DC) states with opposite momenta and spin orientation indicated by the asymmetry in photoemission intensity of the DC states is accompanied by the k||-shift of the DC states relative to the non-spin-polarized conduction band states located at k|| = 0. We relate the observed k||-shift to the induced surface in-plane magnetic field and corresponding magnetization due to the spin accumulation. The direction of the DC k||-shift and its value are changed with photon energy in correlation with variation of the sign and magnitude of the DC states intensity asymmetry. The theoretical estimations describe well the effect and predict the DC k||-shift values which corroborate the experimental observations. This finding opens new perspectives for effective local magnetization manipulation.

Original languageEnglish
Article number6544
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

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cones
synchrotron radiation
asymmetry
insulators
laser beams
magnetic fields
shift
magnetization
photoelectric emission
photoexcitation
manipulators
conduction bands
momentum
photons
spectroscopy
energy

Scopus subject areas

  • General

Cite this

@article{a25b142bf5b047f0b742505e2752cf2a,
title = "Dirac cone intensity asymmetry and surface magnetic field in V-doped and pristine topological insulators generated by synchrotron and laser radiation",
abstract = "Effect of magnetization generated by synchrotron or laser radiation in magnetically-doped and pristine topological insulators (TIs) is presented and analyzed using angle-resolved photoemission spectroscopy. It was found that non-equal photoexcitation of the Dirac cone (DC) states with opposite momenta and spin orientation indicated by the asymmetry in photoemission intensity of the DC states is accompanied by the k||-shift of the DC states relative to the non-spin-polarized conduction band states located at k|| = 0. We relate the observed k||-shift to the induced surface in-plane magnetic field and corresponding magnetization due to the spin accumulation. The direction of the DC k||-shift and its value are changed with photon energy in correlation with variation of the sign and magnitude of the DC states intensity asymmetry. The theoretical estimations describe well the effect and predict the DC k||-shift values which corroborate the experimental observations. This finding opens new perspectives for effective local magnetization manipulation.",
author = "Shikin, {A. M.} and Rybkina, {A. A.} and Estyunin, {D. A.} and Sostina, {D. M.} and Klimovskikh, {I. I.} and Voroshnin, {V. Yu} and Rybkin, {A. G.} and Kokh, {K. A.} and Tereshchenko, {O. E.} and L. Petaccia and {Di Santo}, G. and A. Kimura and Skirdkov, {P. N.} and Zvezdin, {A. K.} and Zvezdin, {A. K.}",
year = "2018",
month = "12",
day = "1",
doi = "10.1038/s41598-018-24716-1",
language = "English",
volume = "8",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
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TY - JOUR

T1 - Dirac cone intensity asymmetry and surface magnetic field in V-doped and pristine topological insulators generated by synchrotron and laser radiation

AU - Shikin, A. M.

AU - Rybkina, A. A.

AU - Estyunin, D. A.

AU - Sostina, D. M.

AU - Klimovskikh, I. I.

AU - Voroshnin, V. Yu

AU - Rybkin, A. G.

AU - Kokh, K. A.

AU - Tereshchenko, O. E.

AU - Petaccia, L.

AU - Di Santo, G.

AU - Kimura, A.

AU - Skirdkov, P. N.

AU - Zvezdin, A. K.

AU - Zvezdin, A. K.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Effect of magnetization generated by synchrotron or laser radiation in magnetically-doped and pristine topological insulators (TIs) is presented and analyzed using angle-resolved photoemission spectroscopy. It was found that non-equal photoexcitation of the Dirac cone (DC) states with opposite momenta and spin orientation indicated by the asymmetry in photoemission intensity of the DC states is accompanied by the k||-shift of the DC states relative to the non-spin-polarized conduction band states located at k|| = 0. We relate the observed k||-shift to the induced surface in-plane magnetic field and corresponding magnetization due to the spin accumulation. The direction of the DC k||-shift and its value are changed with photon energy in correlation with variation of the sign and magnitude of the DC states intensity asymmetry. The theoretical estimations describe well the effect and predict the DC k||-shift values which corroborate the experimental observations. This finding opens new perspectives for effective local magnetization manipulation.

AB - Effect of magnetization generated by synchrotron or laser radiation in magnetically-doped and pristine topological insulators (TIs) is presented and analyzed using angle-resolved photoemission spectroscopy. It was found that non-equal photoexcitation of the Dirac cone (DC) states with opposite momenta and spin orientation indicated by the asymmetry in photoemission intensity of the DC states is accompanied by the k||-shift of the DC states relative to the non-spin-polarized conduction band states located at k|| = 0. We relate the observed k||-shift to the induced surface in-plane magnetic field and corresponding magnetization due to the spin accumulation. The direction of the DC k||-shift and its value are changed with photon energy in correlation with variation of the sign and magnitude of the DC states intensity asymmetry. The theoretical estimations describe well the effect and predict the DC k||-shift values which corroborate the experimental observations. This finding opens new perspectives for effective local magnetization manipulation.

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DO - 10.1038/s41598-018-24716-1

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